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. 2018 Jan 22;15(1):171. doi: 10.3390/ijerph15010171

Figure 1.

Figure 1

Location of sampling sites with zoological orders of wild bird blood samples from 2014–2016 (big red stars = main collectors, small red stars = minor collectors). The samples highlighted in the pie chart represent the total of all samples collected by all minor and major collectors in each region of Germany.